ASTM C-617 (Capping Cylinders with Hydraulic Cement)

ASTM C-617 is a standard procedure for capping concrete cylinders that are used for strength testing. When concrete cylinders are created for testing, their ends must be flat and smooth to ensure accurate results. This standard outlines how to apply a special hydraulic cement to the ends of the cylinders, creating a uniform surface. This process helps to transmit stress evenly during testing, ensuring that the concrete's compressive strength is measured accurately. Proper capping is essential for obtaining reliable data on the concrete's performance and quality.